Added export to word function for the chat (#566)

app/MindWork AI Studio/Tools/PandocExport.cs

@@ -0,0 +1,97 @@
+using System.Diagnostics;
+using AIStudio.Chat;
+using AIStudio.Tools.PluginSystem;
+using AIStudio.Tools.Services;
+
+namespace AIStudio.Tools;
+
+public static class PandocExport
+{
+    private static readonly ILogger LOGGER = Program.LOGGER_FACTORY.CreateLogger(nameof(PandocExport)); 
+    
+    private static string TB(string fallbackEn) => I18N.I.T(fallbackEn, typeof(PandocExport).Namespace, nameof(PandocExport));
+    
+    public static async Task<bool> ToMicrosoftWord(RustService rustService, string dialogTitle, IContent markdownContent)
+    {
+        var response = await rustService.SaveFile(dialogTitle, new("Microsoft Word", ["docx"]));
+        if (response.UserCancelled)
+        {
+            LOGGER.LogInformation("User cancelled the save dialog.");
+            return false;
+        }
+
+        LOGGER.LogInformation($"The user chose the path '{response.SaveFilePath}' for the Microsoft Word export.");
+
+        var tempMarkdownFile = Guid.NewGuid().ToString();
+        var tempMarkdownFilePath = Path.Combine(Path.GetTempPath(), tempMarkdownFile);
+
+        try
+        {
+            // Extract text content from chat:
+            var markdownText = markdownContent switch
+            {
+                ContentText text => text.Text,
+                ContentImage _ => "Image export to Microsoft Word not yet possible",
+
+                _ => "Unknown content type. Cannot export to Word."
+            };
+
+            // Write text content to a temporary file:
+            await File.WriteAllTextAsync(tempMarkdownFilePath, markdownText);
+
+            // Ensure that Pandoc is installed and ready:
+            var pandocState = await Pandoc.CheckAvailabilityAsync(rustService);
+            if (!pandocState.IsAvailable)
+                return false;
+
+            // Call Pandoc to create the Word file:
+            var pandoc = await PandocProcessBuilder
+                .Create()
+                .UseStandaloneMode()
+                .WithInputFormat("markdown")
+                .WithOutputFormat("docx")
+                .WithOutputFile(response.SaveFilePath)
+                .WithInputFile(tempMarkdownFilePath)
+                .BuildAsync(rustService);
+
+            using var process = Process.Start(pandoc.StartInfo);
+            if (process is null)
+            {
+                LOGGER.LogError("Failed to start Pandoc process.");
+                return false;
+            }
+
+            await process.WaitForExitAsync();
+            if (process.ExitCode is not 0)
+            {
+                var error = await process.StandardError.ReadToEndAsync();
+                LOGGER.LogError($"Pandoc failed with exit code {process.ExitCode}: {error}");
+                await MessageBus.INSTANCE.SendError(new(Icons.Material.Filled.Cancel, TB("Error during Microsoft Word export")));
+                return false;
+            }
+
+            LOGGER.LogInformation("Pandoc conversion successful.");
+            await MessageBus.INSTANCE.SendSuccess(new(Icons.Material.Filled.CheckCircle, TB("Microsoft Word export successful")));
+            
+            return true;
+        }
+        catch (Exception ex)
+        {
+            LOGGER.LogError(ex, "Error during Word export.");
+            await MessageBus.INSTANCE.SendError(new(Icons.Material.Filled.Cancel, TB("Error during Microsoft Word export")));
+            return false;
+        }
+        finally
+        {
+            // Try to remove the temp file:
+            try
+            {
+                File.Delete(tempMarkdownFilePath);
+            }
+            catch
+            {
+                LOGGER.LogWarning($"Was not able to delete temporary file: '{tempMarkdownFilePath}'");
+            }
+        }
+    }
+}

app/MindWork AI Studio/Tools/PandocProcessBuilder.cs

@@ -19,6 +19,7 @@ public sealed class PandocProcessBuilder
     private string? providedOutputFile;
     private string? providedInputFormat;
     private string? providedOutputFormat;
+    private bool useStandaloneMode;
     
     private readonly List<string> additionalArguments = new();
     
@@ -57,10 +58,19 @@ public sealed class PandocProcessBuilder
         this.additionalArguments.Add(argument);
         return this;
     }
+
+    public PandocProcessBuilder UseStandaloneMode()
+    {
+        this.useStandaloneMode = true;
+        return this;
+    }
     
     public async Task<PandocPreparedProcess> BuildAsync(RustService rustService)
     {
         var sbArguments = new StringBuilder();
+
+        if (this.useStandaloneMode)
+            sbArguments.Append(" --standalone ");
         
         if(!string.IsNullOrWhiteSpace(this.providedInputFile))
             sbArguments.Append(this.providedInputFile);

app/MindWork AI Studio/Tools/Rust/FileSaveResponse.cs

@@ -0,0 +1,3 @@
+namespace AIStudio.Tools.Rust;
+
+public readonly record struct FileSaveResponse(bool UserCancelled, string SaveFilePath);

app/MindWork AI Studio/Tools/Rust/SaveFileOptions.cs

@@ -0,0 +1,10 @@
+namespace AIStudio.Tools.Rust;
+
+public class SaveFileOptions
+{
+    public required string Title { get; init; }
+    
+    public PreviousFile? PreviousFile { get; init; }
+
+    public FileTypeFilter? Filter { get; init; }
+}

app/MindWork AI Studio/Tools/Services/RustService.FileSystem.cs

@@ -35,4 +35,31 @@ public sealed partial class RustService
         
         return await result.Content.ReadFromJsonAsync<FileSelectionResponse>(this.jsonRustSerializerOptions);
     }
+
+    /// <summary>
+    /// Initiates a dialog to let the user select a file for a writing operation.
+    /// </summary>
+    /// <param name="title">The title of the save file dialog.</param>
+    /// <param name="filter">An optional file type filter for filtering specific file formats.</param>
+    /// <param name="initialFile">An optional initial file path to pre-fill in the dialog.</param>
+    /// <returns>A <see cref="FileSaveResponse"/> object containing information about whether the user canceled the
+    /// operation and whether the select operation was successful.</returns>
+    public async Task<FileSaveResponse> SaveFile(string title, FileTypeFilter? filter = null, string? initialFile = null)
+    {
+        var payload = new SaveFileOptions
+        {
+            Title = title,
+            PreviousFile = initialFile is null ? null : new (initialFile),
+            Filter = filter
+        };
+        
+        var result = await this.http.PostAsJsonAsync("/save/file", payload, this.jsonRustSerializerOptions);
+        if (!result.IsSuccessStatusCode)
+        {
+            this.logger!.LogError($"Failed to select a file for writing operation '{result.StatusCode}'");
+            return new FileSaveResponse(true, string.Empty);
+        }
+        
+        return await result.Content.ReadFromJsonAsync<FileSaveResponse>(this.jsonRustSerializerOptions);
+    }
 }